Improvement in cam-slides for sewing-machines



J. B. SEDUR.

Cam-Slides for Sewing-Machines.

IV/TAIESSES."

flid WWW MA UNITED STATES PATENT OFFICE.

JEROME B. SECOR, OF BRIDGEPORT, CONNECTICUT.

IMPROVEMENT IN CAM-SLIDES FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 157,298, dated December1, 1874; application filed November 3, 1874.

To all whom it may concern Be it known that I, JEROME B. SEooR, ofBridgeport, in the countyofFairfield and State of Connecticut, haveinvented certain new and useful Improvements in Cam-Slides forSewing-Machines; and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable others skilledin the art to which it pertains to make and use the same, referencebeing had to the accompanying drawings and to the letters of referencemarked thereon, which form a part of this specification.

My invention consists in the construction of a metallic slide, withinwhich are two pistons (or one only may be used) adjusted upon a pivot,around which it may revolve freely, such pivot being a prolongation of ascrew that may beattached to the needlc-armof a sewing-machine. Theslide, with its piston or pistons and springs, is constructed so as towork easily within a cam-groove, adapting itself to the varying anglesof the same, the piston and springs compensating for any wear of thesame, and by their construction always filling the groove in the cam.

Figure 1 shows in dotted lines a cam with its groove, the relation ofthe slide with its springs and piston to the needle-arm, and groove incam. Fig. 2 shows the adjustment of the slide upon its pivot, one of thepistons connected with the same, and within the groove formed upon thecam, the latter in dotted lines. Fig. 3 shows the screw-rod that isattached to the needle-arm of the sewingmaehine, the slide upon itspivot, and the heads of the pistons within the slide. Fig. 4 is a crossvertical section of the slide, showing piston and spring adjusted withinthe slide. Fig. 5 is a cross vertical section of the slide in line m 00,Fig. 3, showing the relation of the pistons and springs to the slide.

I11 the drawings, A represents the n eedlearm, to which the screw-rod (Zis attached; B the cam, and c the groove in the cam; b, the slideblock;1', the pivot, around which it rotates in its passage through thecam-groove; a a, the pistons, secured Within the slideblock; and a a,the springs of the pistons secured within the same, as shown in Figs. 4and 5.

This invention is adapted for use to other than sewing-machines.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination of the springs a a and pistons a a with the block band pivot t, in the manner and for the purpose herein set forth.

2. The combination of the block or slide b with the cam and its grooveof a sewing or other machine, when said block or slide is supplied withsprings a and pistons a, the whole constructed, arranged, and operatedin the manner and for the purpose herein set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

JEROME B. SECOR.

Witnesses:

DAVID P. SEooR, GEO. W. WARNER.

